The United States and Japan have made significant progress in trade talks over recent days, adding momentum to multilateral efforts toward a free-trade pact, U.S. Trade Representative Michael Froman said early on Tuesday. The two sides narrowed their gaps substantially in the bilateral discussions, Froman told reporters after two days of talks with Economy Minister Akira Amari, following senior working-level discussions last week. The bilateral deal between the two nations is vital to the success of a 12-nation Trans-Pacific Partnership (TPP) trade pact.